'Triangulation Chart and Reconnaissance Survey. E-Uaso Nḡiro - Marsabit'. 'By G.F. Archer F.R.G.S. District Commissioner. Marsabit 1909:1910.'
Scope & Content:
Indicates hydrology, settlements and relief with form lines and spot heights, with some indication of vegetation. Also shows a caravan route and game reserve boundary
A field sheet. 'Sh[eet].1 Copy' - War Office ledger
Scope & Content:
Shows a route from Uaso Nḡiro to Marsabit, indicating hydrology and trig points, with some indication of relief with form lines and spot heights. Also provides brief descriptions of topography
'Reconnaissance Sketch and Triangulation Chart. Marsabit - the Abyssinian Frontier. By G.F. Archer.'
Scope & Content:
Indicates hydrology, settlements and relief with form lines and spot heights, with brief descriptions of vegetation and topography. Also shows the survey route
'Capt. Behrens' Sketch from Attached Original July 22nd. 07' - sheet 1. 'Capt. Behrens' Adjustment to Part of A.G.Comn.(Bdy).E.Africa Tracing-Linen - Sheet IV' - sheet 2
Scope & Content:
Show corrections to field sheets 19 and 22 held at WOOS/8/2/1
'Report to Accompany Field Sheet Tsavo-Laitokitok.'. 'By Lt. TT. Behrens' - War Office ledger
Scope & Content:
Provides notes on survey and cartographic methodology, with descriptions of terrain, in sections entitled Heights, Rivers, Water, Hills, Vegetation, Names, Country and Formation
'Report and Photographs. to Accompany Field Sheet 1/250,000. Anglo-German Boundary Commission British East Africa.'. 'Dar es Salaam. T.T. Behrens. Lt. R.E. 6/1/06.'
Scope & Content:
Provides notes on survey and cartographic methodology, with descriptions of terrain, in sections entitled Heights, Rivers, Water, Hills, Vegetation, Names, Country and Formation